75243701812 has 6 divisors (see below), whose sum is σ = 131676478178. Its totient is φ = 37621850904.

The previous prime is 75243701783. The next prime is 75243701821. The reversal of 75243701812 is 21810734257.

It can be written as a sum of positive squares in only one way, i.e., 71478161316 + 3765540496 = 267354^2 + 61364^2 .

It is a super-2 number, since 2×75243701812² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9405462723 + ... + 9405462730.

Almost surely, 2^75243701812 is an apocalyptic number.

It is an amenable number.

75243701812 is a deficient number, since it is larger than the sum of its proper divisors (56432776366).

75243701812 is a wasteful number, since it uses less digits than its factorization.

75243701812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18810925457 (or 18810925455 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 75243701812 in words is "seventy-five billion, two hundred forty-three million, seven hundred one thousand, eight hundred twelve".